Because you like Cory Matthews in Boy Meets World
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
Andy Dwyer might not be completely literate, but he makes up for it in spirit. See them in Parks and Recreation.
Santana Lopez is a cutthroat cheerleader who's not afraid to speak, or sing, her mind. See them in Glee.
On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.
Felicity Smoak is a brilliant hacker who nonetheless becomes tongue-tied in front of attractive men. See them in DC Extended Universe.
It's impossible to say whether Winifred Burkle is cuter than she is smart, or vice versa. See them in Angel.
N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.
Queenie Goldstein is beautiful, kind, and probably currently reading your mind. See them in Fantastic Beasts and Where To Find Them.
Humble, caring, and protective, Scott McCall tries to make the best of his newfound status as a werewolf. See them in Teen Wolf.
Dutiful, composed, and aloof, Sun Bak is the fighting force behind her team of eight "sensates" who are telepathically linked. See them in Sense8.